198 lines
7.0 KiB
Python
198 lines
7.0 KiB
Python
from __future__ import unicode_literals
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import re
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try:
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from urllib.parse import urlsplit, urlunsplit
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except ImportError: # Python 2
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from urlparse import urlsplit, urlunsplit
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from django.core.exceptions import ValidationError
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from django.utils.translation import ugettext_lazy as _
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from django.utils.encoding import force_text
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from django.utils.ipv6 import is_valid_ipv6_address
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from django.utils import six
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# These values, if given to validate(), will trigger the self.required check.
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EMPTY_VALUES = (None, '', [], (), {})
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class RegexValidator(object):
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regex = ''
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message = _('Enter a valid value.')
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code = 'invalid'
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def __init__(self, regex=None, message=None, code=None):
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if regex is not None:
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self.regex = regex
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if message is not None:
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self.message = message
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if code is not None:
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self.code = code
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# Compile the regex if it was not passed pre-compiled.
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if isinstance(self.regex, six.string_types):
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self.regex = re.compile(self.regex)
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def __call__(self, value):
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"""
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Validates that the input matches the regular expression.
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"""
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if not self.regex.search(force_text(value)):
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raise ValidationError(self.message, code=self.code)
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class URLValidator(RegexValidator):
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regex = re.compile(
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r'^(?:http|ftp)s?://' # http:// or https://
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r'(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|' # domain...
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r'localhost|' # localhost...
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r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}|' # ...or ipv4
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r'\[?[A-F0-9]*:[A-F0-9:]+\]?)' # ...or ipv6
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r'(?::\d+)?' # optional port
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r'(?:/?|[/?]\S+)$', re.IGNORECASE)
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def __call__(self, value):
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try:
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super(URLValidator, self).__call__(value)
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except ValidationError as e:
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# Trivial case failed. Try for possible IDN domain
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if value:
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value = force_text(value)
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scheme, netloc, path, query, fragment = urlsplit(value)
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try:
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netloc = netloc.encode('idna').decode('ascii') # IDN -> ACE
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except UnicodeError: # invalid domain part
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raise e
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url = urlunsplit((scheme, netloc, path, query, fragment))
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super(URLValidator, self).__call__(url)
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else:
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raise
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else:
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url = value
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def validate_integer(value):
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try:
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int(value)
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except (ValueError, TypeError):
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raise ValidationError('')
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class EmailValidator(RegexValidator):
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def __call__(self, value):
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try:
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super(EmailValidator, self).__call__(value)
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except ValidationError as e:
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# Trivial case failed. Try for possible IDN domain-part
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if value and '@' in value:
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parts = value.split('@')
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try:
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parts[-1] = parts[-1].encode('idna').decode('ascii')
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except UnicodeError:
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raise e
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super(EmailValidator, self).__call__('@'.join(parts))
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else:
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raise
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email_re = re.compile(
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r"(^[-!#$%&'*+/=?^_`{}|~0-9A-Z]+(\.[-!#$%&'*+/=?^_`{}|~0-9A-Z]+)*" # dot-atom
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# quoted-string, see also http://tools.ietf.org/html/rfc2822#section-3.2.5
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r'|^"([\001-\010\013\014\016-\037!#-\[\]-\177]|\\[\001-\011\013\014\016-\177])*"'
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r')@((?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)$)' # domain
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r'|\[(25[0-5]|2[0-4]\d|[0-1]?\d?\d)(\.(25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}\]$', re.IGNORECASE) # literal form, ipv4 address (SMTP 4.1.3)
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validate_email = EmailValidator(email_re, _('Enter a valid email address.'), 'invalid')
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slug_re = re.compile(r'^[-a-zA-Z0-9_]+$')
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validate_slug = RegexValidator(slug_re, _("Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens."), 'invalid')
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ipv4_re = re.compile(r'^(25[0-5]|2[0-4]\d|[0-1]?\d?\d)(\.(25[0-5]|2[0-4]\d|[0-1]?\d?\d)){3}$')
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validate_ipv4_address = RegexValidator(ipv4_re, _('Enter a valid IPv4 address.'), 'invalid')
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def validate_ipv6_address(value):
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if not is_valid_ipv6_address(value):
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raise ValidationError(_('Enter a valid IPv6 address.'), code='invalid')
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def validate_ipv46_address(value):
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try:
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validate_ipv4_address(value)
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except ValidationError:
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try:
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validate_ipv6_address(value)
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except ValidationError:
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raise ValidationError(_('Enter a valid IPv4 or IPv6 address.'), code='invalid')
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ip_address_validator_map = {
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'both': ([validate_ipv46_address], _('Enter a valid IPv4 or IPv6 address.')),
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'ipv4': ([validate_ipv4_address], _('Enter a valid IPv4 address.')),
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'ipv6': ([validate_ipv6_address], _('Enter a valid IPv6 address.')),
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}
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def ip_address_validators(protocol, unpack_ipv4):
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"""
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Depending on the given parameters returns the appropriate validators for
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the GenericIPAddressField.
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This code is here, because it is exactly the same for the model and the form field.
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"""
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if protocol != 'both' and unpack_ipv4:
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raise ValueError(
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"You can only use `unpack_ipv4` if `protocol` is set to 'both'")
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try:
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return ip_address_validator_map[protocol.lower()]
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except KeyError:
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raise ValueError("The protocol '%s' is unknown. Supported: %s"
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% (protocol, list(ip_address_validator_map)))
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comma_separated_int_list_re = re.compile('^[\d,]+$')
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validate_comma_separated_integer_list = RegexValidator(comma_separated_int_list_re, _('Enter only digits separated by commas.'), 'invalid')
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class BaseValidator(object):
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compare = lambda self, a, b: a is not b
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clean = lambda self, x: x
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message = _('Ensure this value is %(limit_value)s (it is %(show_value)s).')
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code = 'limit_value'
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def __init__(self, limit_value):
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self.limit_value = limit_value
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def __call__(self, value):
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cleaned = self.clean(value)
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params = {'limit_value': self.limit_value, 'show_value': cleaned}
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if self.compare(cleaned, self.limit_value):
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raise ValidationError(
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self.message % params,
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code=self.code,
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params=params,
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)
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class MaxValueValidator(BaseValidator):
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compare = lambda self, a, b: a > b
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message = _('Ensure this value is less than or equal to %(limit_value)s.')
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code = 'max_value'
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class MinValueValidator(BaseValidator):
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compare = lambda self, a, b: a < b
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message = _('Ensure this value is greater than or equal to %(limit_value)s.')
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code = 'min_value'
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class MinLengthValidator(BaseValidator):
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compare = lambda self, a, b: a < b
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clean = lambda self, x: len(x)
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message = _('Ensure this value has at least %(limit_value)d characters (it has %(show_value)d).')
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code = 'min_length'
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class MaxLengthValidator(BaseValidator):
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compare = lambda self, a, b: a > b
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clean = lambda self, x: len(x)
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message = _('Ensure this value has at most %(limit_value)d characters (it has %(show_value)d).')
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code = 'max_length'
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